Abstract
Original language | English |
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Patent number | US8811119 (B2) |
Priority date | 20/05/10 |
Publication status | Published - 19 Aug 2014 |
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Bibliographical note
Also published as:EP2572212 (A1)
US2013064042 (A1)
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Distance estimation using sound signals. / Aarts, R.M. (Inventor); Lamb, W.J. (Inventor).
Patent No.: US8811119 (B2).Research output: Patent › Patent publication
TY - PAT
T1 - Distance estimation using sound signals
AU - Aarts, R.M.
AU - Lamb, W.J.
N1 - Also published as: EP2572212 (A1) US2013064042 (A1)
PY - 2014/8/19
Y1 - 2014/8/19
N2 - An apparatus comprises a test signal generator (401) which generates an ultrasonic test signal by modulating an audio band test signal on an ultrasonic signal. The ultrasonic test signal is radiated from a parametric loudspeaker (403) and is demodulated by non-linearities in the air. A reflected audio signal may arise from reflections of an object, such as a wall. An audio band sensor (405) generates an audio band captured signal which comprises the demodulated reflected audio band signal. A distance circuit (407) then generates a distance estimate for the distance from the parametric loudspeaker (403) to the object in response to a comparison of the audio band captured signal and the audio band test signal. Specifically two signals may be correlated to determine a delay corresponding to the full path length.; Based on the distance estimates an audio environment may be estimated and a sound system may be adapted accordingly.
AB - An apparatus comprises a test signal generator (401) which generates an ultrasonic test signal by modulating an audio band test signal on an ultrasonic signal. The ultrasonic test signal is radiated from a parametric loudspeaker (403) and is demodulated by non-linearities in the air. A reflected audio signal may arise from reflections of an object, such as a wall. An audio band sensor (405) generates an audio band captured signal which comprises the demodulated reflected audio band signal. A distance circuit (407) then generates a distance estimate for the distance from the parametric loudspeaker (403) to the object in response to a comparison of the audio band captured signal and the audio band test signal. Specifically two signals may be correlated to determine a delay corresponding to the full path length.; Based on the distance estimates an audio environment may be estimated and a sound system may be adapted accordingly.
UR - http://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=0&ND=5&at=8&locale=nl_NL&FT=D&CC=US&NR=8811119B2&KC=B2
M3 - Patent publication
M1 - US8811119 (B2)
ER -